Means for connecting the shafts of mixing machines to the hubs of mixing or agitating blades



-Feb'.13,19'23. I I 1,445,175;

K. SCHLEIP. v MEANS FOR CONNECTING THE SHAFTS 0F MIXING MACHINES TO THEHUBS 0F MIXING 0R AGITATING BLADES.

FILED JUNE 18. 1921.

Fig.4.

?atented Feb. 13, 1923.

UNITED sures P TENT-OFFICE.

KURT SGHLEIP, OF ESSEN, GERMANY, ASSIGNOR T FRIED. KRUIPP AKTIENGESELL-serum, or nssnn-on-Tnn-ntrnn, GERMANY.

MEANS FOR CONNECTING THE SHAFTS OF MIXING MACHINES TO THE HITEBS OFMIXING- OR AGITATING BLADES.

Application filed June 18, 1921. Serial No. 478,762.

To all'whom it may concern.

Be it known that I, KURT SoHLmr, residing at Essen, Germany, a citizenof the German Republic, have invented a-certain new and usefulImprovement in Means for Connecting the Shafts of Mixing Machines to theHubs of Mixing or Agitating Blades, of which the following is aspecification.

This invention relates to means for connee-ting the shafts of mixingmachines to the hub of the mixing or agitating'blades, so constructedthat the shaft cannot rotate independently relatively to the blades orbe disconnected nor moved longitudinally relatively thereto.

The invention is particularly useful when the material of the blades is,for example, cast silicon that cannot be machined.

The invention will be more fully described and illustrated in theaccompanying drawings in which:

Fig. 1 is a vertical section through a mixing machine, and

Fig. 2 is a section on lines 22 of Fig. 1.

The drive shaft A of the mixer carries on its lower end a head a ofrectangular cross section. The hub Z) of the agitator B has arectangular opening 6 of the same crosssectional dimensions as the heada of the shaft A. The opening 6 forms the entrance to a hollow space 72otherwise closed on all sides and likewise of rectangular cross section.To form the connection, the head a of the shaft A is inserted throughthe opening 6 into the hollow space 6 of the hub 5 and is then rotatedthrough degrees relatively to the opening 6 (Fig. 2.) The space 6 isthen filled with molten material which 40 hardens when cold, forexample, lead. The blades B are thereby secured to the drive shaft Aagainst rotation as well as independent longitudinal movement. Since theopening b and the hollow space I) can be formed at the time theagitatorB is cast, no machining or finishing of the agitator is necessecuredtherein by filling said recess with a molten material which is adaptedto.

harden.

2. A coupling arrangement for connecting a pair of parts comprising arectangular head formed on the end of one of said parts, the other partbeing formed with a recess having a rectangular opening of smallerdimension, said head being of such dimensions as to enable it to entersaid recess through said opening, said shaft bein adapted to be rotatedthrough a forty-five degree angle, said recess then receiving moltenlead which 'hardens to permanently secure said head in place within saidrecess.

3. The method of coupling a member provided with a recess having arectangular opening of smaller dimension to a second member providedwith a rectangular head which consists in inserting the rectangular headof the second member into the recess formed in the first member,rotatinv the head of said second member through an angle of 45 withrespect to the opening of said recess and filling said recess withmoulten lead, which sets in cooling.

The foregoing specification signed at Es- I sen, Germany, this 7th dayof May, 1921. KURT SCI-ILEIP.

